/*
 * Copyright (c) 1996, 2003, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package com.sun.corba.se.impl.naming.cosnaming;

// Imports for Logging

import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.corba.se.impl.orbutil.LogKeywords;

// Import general CORBA classes
import org.omg.CORBA.Object;
import org.omg.CORBA.BAD_PARAM;
import org.omg.CORBA.INTERNAL;
import org.omg.CORBA.CompletionStatus;
import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant;

// Import org.omg.CosNaming classes
import org.omg.CosNaming.BindingType;
import org.omg.CosNaming.BindingTypeHolder;
import org.omg.CosNaming.BindingListHolder;
import org.omg.CosNaming.BindingIteratorHolder;
import org.omg.CosNaming.NameComponent;
import org.omg.CosNaming.NamingContextHelper;
import org.omg.CosNaming.NamingContext;
import org.omg.CosNaming.NamingContextPackage.*;
import org.omg.CosNaming._NamingContextImplBase;
import org.omg.CosNaming.NamingContextExtHelper;
import org.omg.CosNaming.NamingContextExt;
import org.omg.CosNaming.NamingContextExtPOA;
import org.omg.CosNaming.NamingContextExtPackage.*;
import org.omg.CosNaming.NamingContextPackage.NotFound;

import com.sun.corba.se.impl.naming.cosnaming.NamingContextDataStore;

import com.sun.corba.se.impl.naming.namingutil.INSURLHandler;
import com.sun.corba.se.spi.logging.CORBALogDomains;
import com.sun.corba.se.impl.logging.NamingSystemException;

import com.sun.corba.se.spi.orb.ORB;

/**
 * Class NamingContextImpl implements the org.omg.CosNaming::NamingContext
 * interface, but does not implement the methods associated with
 * maintaining the "table" of current bindings in a NamingContext.
 * Instead, this implementation assumes that the derived implementation
 * implements the NamingContextDataStore interface, which has the necessary
 * methods. This allows multiple
 * NamingContext implementations that differ in storage of the bindings,
 * as well as implementations of interfaces derived from
 * CosNaming::NamingContext that still reuses the implementation.
 * <p>
 * The operations bind(), rebind(), bind_context() and rebind_context()
 * are all really implemented by doBind(). resolve() is really implemented
 * by doResolve(), unbind() by doUnbind(). list(), new_context() and
 * destroy() uses the NamingContextDataStore interface directly. All the
 * doX() methods are public static.
 * They synchronize on the NamingContextDataStore object.
 * <p>
 * An implementation a NamingContext must extend this class and implement
 * the NamingContextDataStore interface with the operations:
 * Bind(), Resolve(),
 * Unbind(), List(), NewContext() and Destroy(). Calls
 * to these methods are synchronized; these methods should
 * therefore not be synchronized.
 */
public abstract class NamingContextImpl
    extends NamingContextExtPOA
    implements NamingContextDataStore {

  protected POA nsPOA;
  private Logger readLogger, updateLogger, lifecycleLogger;
  private NamingSystemException wrapper;
  private static NamingSystemException staticWrapper =
      NamingSystemException.get(CORBALogDomains.NAMING_UPDATE);

  // The grammer for Parsing and Building Interoperable Stringified Names
  // are implemented in this class
  private InterOperableNamingImpl insImpl;

  /**
   * Create a naming context servant.
   * Runs the super constructor.
   *
   * @param orb an ORB object.
   * @throws java.lang.Exception a Java exception.
   */
  public NamingContextImpl(ORB orb, POA poa) throws java.lang.Exception {
    super();
    this.orb = orb;
    wrapper = NamingSystemException.get(orb,
        CORBALogDomains.NAMING_UPDATE);

    insImpl = new InterOperableNamingImpl();
    this.nsPOA = poa;
    readLogger = orb.getLogger(CORBALogDomains.NAMING_READ);
    updateLogger = orb.getLogger(CORBALogDomains.NAMING_UPDATE);
    lifecycleLogger = orb.getLogger(
        CORBALogDomains.NAMING_LIFECYCLE);
  }

  public POA getNSPOA() {
    return nsPOA;
  }

  /**
   * Bind an object under a name in this NamingContext. If the name
   * contains multiple (n) components, n-1 will be resolved in this
   * NamingContext and the object bound in resulting NamingContext.
   * An exception is thrown if a binding with the supplied name already
   * exists. If the
   * object to be bound is a NamingContext it will not participate in
   * a recursive resolve.
   *
   * @param n a sequence of NameComponents which is the name under which the object will be bound.
   * @param obj the object reference to be bound.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * n-1 components of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CosNaming.NamingContextPackage.AlreadyBound An object is already bound under
   * the supplied name.
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see doBind
   */
  public void bind(NameComponent[] n, org.omg.CORBA.Object obj)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName,
      org.omg.CosNaming.NamingContextPackage.AlreadyBound {
    if (obj == null) {
      updateLogger.warning(LogKeywords.NAMING_BIND +
          " unsuccessful because NULL Object cannot be Bound ");
      throw wrapper.objectIsNull();
    }
    // doBind implements all four flavors of binding
    NamingContextDataStore impl = (NamingContextDataStore) this;
    doBind(impl, n, obj, false, BindingType.nobject);
    if (updateLogger.isLoggable(Level.FINE)) {
      // isLoggable call to make sure that we save some precious
      // processor cycles, if there is no need to log.
      updateLogger.fine(LogKeywords.NAMING_BIND_SUCCESS + " Name = " +
          NamingUtils.getDirectoryStructuredName(n));
    }
  }


  /**
   * Bind a NamingContext under a name in this NamingContext. If the name
   * contains multiple (n) components, n-1 will be resolved in this
   * NamingContext and the object bound in resulting NamingContext.
   * An exception is thrown if a binding with the supplied name already
   * exists. The NamingContext will participate in recursive resolving.
   *
   * @param n a sequence of NameComponents which is the name under which the object will be bound.
   * @param obj the NamingContect object reference to be bound.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * n-1 components of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CosNaming.NamingContextPackage.AlreadyBound An object is already bound under
   * the supplied name.
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see doBind
   */
  public void bind_context(NameComponent[] n, NamingContext nc)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName,
      org.omg.CosNaming.NamingContextPackage.AlreadyBound {
    if (nc == null) {
      updateLogger.warning(LogKeywords.NAMING_BIND_FAILURE +
          " NULL Context cannot be Bound ");
      throw new BAD_PARAM("Naming Context should not be null ");
    }
    // doBind implements all four flavors of binding
    NamingContextDataStore impl = (NamingContextDataStore) this;
    doBind(impl, n, nc, false, BindingType.ncontext);
    if (updateLogger.isLoggable(Level.FINE)) {
      // isLoggable call to make sure that we save some precious
      // processor cycles, if there is no need to log.
      updateLogger.fine(LogKeywords.NAMING_BIND_SUCCESS + " Name = " +
          NamingUtils.getDirectoryStructuredName(n));
    }
  }

  /**
   * Bind an object under a name in this NamingContext. If the name
   * contains multiple (n) components, n-1 will be resolved in this
   * NamingContext and the object bound in resulting NamingContext.
   * If a binding under the supplied name already exists it will be
   * unbound first. If the
   * object to be bound is a NamingContext it will not participate in
   * a recursive resolve.
   *
   * @param n a sequence of NameComponents which is the name under which the object will be bound.
   * @param obj the object reference to be bound.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * n-1 components of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see doBind
   */
  public void rebind(NameComponent[] n, org.omg.CORBA.Object obj)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName {
    if (obj == null) {
      updateLogger.warning(LogKeywords.NAMING_REBIND_FAILURE +
          " NULL Object cannot be Bound ");
      throw wrapper.objectIsNull();
    }
    try {
      // doBind implements all four flavors of binding
      NamingContextDataStore impl = (NamingContextDataStore) this;
      doBind(impl, n, obj, true, BindingType.nobject);
    } catch (org.omg.CosNaming.NamingContextPackage.AlreadyBound ex) {
      updateLogger.warning(LogKeywords.NAMING_REBIND_FAILURE +
          NamingUtils.getDirectoryStructuredName(n) +
          " is already bound to a Naming Context");
      // This should not happen
      throw wrapper.namingCtxRebindAlreadyBound(ex);
    }
    if (updateLogger.isLoggable(Level.FINE)) {
      // isLoggable call to make sure that we save some precious
      // processor cycles, if there is no need to log.
      updateLogger.fine(LogKeywords.NAMING_REBIND_SUCCESS + " Name = " +
          NamingUtils.getDirectoryStructuredName(n));
    }
  }

  /**
   * Bind a NamingContext under a name in this NamingContext. If the name
   * contains multiple (n) components, the first n-1 components will be
   * resolved in this NamingContext and the object bound in resulting
   * NamingContext. If a binding under the supplied name already exists it
   * will be unbound first. The NamingContext will participate in recursive
   * resolving.
   *
   * @param n a sequence of NameComponents which is the name under which the object will be bound.
   * @param obj the object reference to be bound.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * n-1 components of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see doBind
   */
  public void rebind_context(NameComponent[] n, NamingContext nc)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName {
    if (nc == null) {
      updateLogger.warning(LogKeywords.NAMING_REBIND_FAILURE +
          " NULL Context cannot be Bound ");
      throw wrapper.objectIsNull();
    }
    try {
      // doBind implements all four flavors of binding
      NamingContextDataStore impl = (NamingContextDataStore) this;
      doBind(impl, n, nc, true, BindingType.ncontext);
    } catch (org.omg.CosNaming.NamingContextPackage.AlreadyBound ex) {
      // This should not happen
      updateLogger.warning(LogKeywords.NAMING_REBIND_FAILURE +
          NamingUtils.getDirectoryStructuredName(n) +
          " is already bound to a CORBA Object");
      throw wrapper.namingCtxRebindctxAlreadyBound(ex);
    }
    if (updateLogger.isLoggable(Level.FINE)) {
      // isLoggable call to make sure that we save some precious
      // processor cycles, if there is no need to log.
      updateLogger.fine(LogKeywords.NAMING_REBIND_SUCCESS + " Name = " +
          NamingUtils.getDirectoryStructuredName(n));
    }
  }

  /**
   * Resolve a name in this NamingContext and return the object reference
   * bound to the name. If the name contains multiple (n) components,
   * the first component will be resolved in this NamingContext and the
   * remaining components resolved in the resulting NamingContext, provided
   * that the NamingContext bound to the first component of the name was
   * bound with bind_context().
   *
   * @param n a sequence of NameComponents which is the name to be resolved.
   * @return the object reference bound under the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * n-1 components of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see doResolve
   */
  public org.omg.CORBA.Object resolve(NameComponent[] n)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName {
    // doResolve actually resolves
    NamingContextDataStore impl = (NamingContextDataStore) this;
    org.omg.CORBA.Object obj = doResolve(impl, n);
    if (obj != null) {
      if (readLogger.isLoggable(Level.FINE)) {
        readLogger.fine(LogKeywords.NAMING_RESOLVE_SUCCESS +
            " Name: " + NamingUtils.getDirectoryStructuredName(n));
      }
    } else {
      readLogger.warning(LogKeywords.NAMING_RESOLVE_FAILURE +
          " Name: " + NamingUtils.getDirectoryStructuredName(n));
    }
    return obj;
  }


  /**
   * Remove a binding from this NamingContext. If the name contains
   * multiple (n) components, the first n-1 components will be resolved
   * from this NamingContext and the final component unbound in
   * the resulting NamingContext.
   *
   * @param n a sequence of NameComponents which is the name to be unbound.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * n-1 components of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see doUnbind
   */
  public void unbind(NameComponent[] n)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName {
    // doUnbind actually unbinds
    NamingContextDataStore impl = (NamingContextDataStore) this;
    doUnbind(impl, n);
    if (updateLogger.isLoggable(Level.FINE)) {
      // isLoggable call to make sure that we save some precious
      // processor cycles, if there is no need to log.
      updateLogger.fine(LogKeywords.NAMING_UNBIND_SUCCESS +
          " Name: " + NamingUtils.getDirectoryStructuredName(n));
    }
  }

  /**
   * List the contents of this NamingContest. A sequence of bindings
   * is returned (a BindingList) containing up to the number of requested
   * bindings, and a BindingIterator object reference is returned for
   * iterating over the remaining bindings.
   *
   * @param how_many The number of requested bindings in the BindingList.
   * @param bl The BindingList as an out parameter.
   * @param bi The BindingIterator as an out parameter.
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see BindingListHolder
   * @see BindingIteratorImpl
   */
  public void list(int how_many, BindingListHolder bl,
      BindingIteratorHolder bi) {
    // List actually generates the list
    NamingContextDataStore impl = (NamingContextDataStore) this;
    synchronized (impl) {
      impl.List(how_many, bl, bi);
    }
    if (readLogger.isLoggable(Level.FINE) && (bl.value != null)) {
      // isLoggable call to make sure that we save some precious
      // processor cycles, if there is no need to log.
      readLogger.fine(LogKeywords.NAMING_LIST_SUCCESS +
          "list(" + how_many + ") -> bindings[" + bl.value.length +
          "] + iterator: " + bi.value);
    }
  }

  /**
   * Create a NamingContext object and return its object reference.
   *
   * @return an object reference for a new NamingContext object implemented by this Name Server.
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   */
  public synchronized NamingContext new_context() {
    // Create actually creates a new naming context
    lifecycleLogger.fine("Creating New Naming Context ");
    NamingContextDataStore impl = (NamingContextDataStore) this;
    synchronized (impl) {
      NamingContext nctx = impl.NewContext();
      if (nctx != null) {
        lifecycleLogger.fine(LogKeywords.LIFECYCLE_CREATE_SUCCESS);
      } else {
        // If naming context is null, then that must be a serious
        // error.
        lifecycleLogger.severe(LogKeywords.LIFECYCLE_CREATE_FAILURE);
      }
      return nctx;
    }
  }

  /**
   * Create a new NamingContext, bind it in this Naming Context and return
   * its object reference. This is equivalent to using new_context() followed
   * by bind_context() with the supplied name and the object reference for
   * the newly created NamingContext.
   *
   * @param n a sequence of NameComponents which is the name to be unbound.
   * @return an object reference for a new NamingContext object implemented by this Name Server,
   * bound to the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.AlreadyBound An object is already bound under
   * the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * n-1 components of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see new_context
   * @see bind_context
   */
  public NamingContext bind_new_context(NameComponent[] n)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.AlreadyBound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName {
    NamingContext nc = null;
    NamingContext rnc = null;
    try {
      if (debug) {
        dprint("bind_new_context " + nameToString(n));
      }
      // The obvious solution:
      nc = this.new_context();
      this.bind_context(n, nc);
      rnc = nc;
      nc = null;
    } finally {
      try {
        if (nc != null) {
          nc.destroy();
        }
      } catch (org.omg.CosNaming.NamingContextPackage.NotEmpty e) {
      }
    }
    if (updateLogger.isLoggable(Level.FINE)) {
      // isLoggable call to make sure that we save some precious
      // processor cycles, if there is no need to log.
      updateLogger.fine(LogKeywords.NAMING_BIND +
          "New Context Bound To " +
          NamingUtils.getDirectoryStructuredName(n));
    }
    return rnc;
  }

  /**
   * Destroy this NamingContext object. If this NamingContext contains
   * no bindings, the NamingContext is deleted.
   *
   * @throws org.omg.CosNaming.NamingContextPackage.NotEmpty This NamingContext is not empty (i.e.,
   * contains bindings).
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   */
  public void destroy()
      throws org.omg.CosNaming.NamingContextPackage.NotEmpty {
    lifecycleLogger.fine("Destroying Naming Context ");
    NamingContextDataStore impl = (NamingContextDataStore) this;
    synchronized (impl) {
      if (impl.IsEmpty() == true) {
        // The context is empty so it can be destroyed
        impl.Destroy();
        lifecycleLogger.fine(LogKeywords.LIFECYCLE_DESTROY_SUCCESS);
      } else {
        // This context is not empty!
        // Not a fatal error, warning should do.
        lifecycleLogger.warning(LogKeywords.LIFECYCLE_DESTROY_FAILURE +
            " NamingContext children are not destroyed still..");
        throw new NotEmpty();
      }
    }
  }

  /**
   * Implements all four flavors of binding. It uses Resolve() to
   * check if a binding already exists (for bind and bind_context), and
   * unbind() to ensure that a binding does not already exist.
   * If the length of the name is 1, then Bind() is called with
   * the name and the object to bind. Otherwise, the first component
   * of the name is resolved in this NamingContext and the appropriate
   * form of bind passed to the resulting NamingContext.
   * This method is static for maximal reuse - even for extended naming
   * context implementations where the recursive semantics still apply.
   *
   * @param impl an implementation of NamingContextDataStore
   * @param n a sequence of NameComponents which is the name under which the object will be bound.
   * @param obj the object reference to be bound.
   * @param rebind Replace an existing binding or not.
   * @param bt Type of binding (as object or as context).
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not     * proceed in
   * resolving the first component of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CosNaming.NamingContextPackage.AlreadyBound An object is already bound under
   * the supplied name.
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see resolve
   * @see unbind
   * @see bind
   * @see bind_context
   * @see rebind
   * @see rebind_context
   */
  public static void doBind(NamingContextDataStore impl,
      NameComponent[] n,
      org.omg.CORBA.Object obj,
      boolean rebind,
      org.omg.CosNaming.BindingType bt)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName,
      org.omg.CosNaming.NamingContextPackage.AlreadyBound {
    // Valid name?
    if (n.length < 1) {
      throw new InvalidName();
    }

    // At bottom level?
    if (n.length == 1) {
      // The identifier must be set
      if ((n[0].id.length() == 0) && (n[0].kind.length() == 0)) {
        throw new InvalidName();
      }

      // Ensure synchronization of backend
      synchronized (impl) {
        // Yes: bind object in this context under the name
        BindingTypeHolder bth = new BindingTypeHolder();
        if (rebind) {
          org.omg.CORBA.Object objRef = impl.Resolve(n[0], bth);
          if (objRef != null) {
            // Refer Naming Service Doc:00-11-01 section 2.2.3.4
            // If there is an object already bound with the name
            // and the binding type is not ncontext a NotFound
            // Exception with a reason of not a context has to be
            // raised.
            // Fix for bug Id: 4384628
            if (bth.value.value() == BindingType.nobject.value()) {
              if (bt.value() == BindingType.ncontext.value()) {
                throw new NotFound(
                    NotFoundReason.not_context, n);
              }
            } else {
              // Previously a Context was bound and now trying to
              // bind Object. It is invalid.
              if (bt.value() == BindingType.nobject.value()) {
                throw new NotFound(
                    NotFoundReason.not_object, n);
              }
            }
            impl.Unbind(n[0]);
          }

        } else {
          if (impl.Resolve(n[0], bth) != null)
          // "Resistence is futile." [Borg pickup line]
          {
            throw new AlreadyBound();
          }
        }

        // Now there are no other bindings under this name
        impl.Bind(n[0], obj, bt);
      }
    } else {
      // No: bind in a different context
      NamingContext context = resolveFirstAsContext(impl, n);

      // Compute tail
      NameComponent[] tail = new NameComponent[n.length - 1];
      System.arraycopy(n, 1, tail, 0, n.length - 1);

      // How should we propagate the bind
      switch (bt.value()) {
        case BindingType._nobject: {
          // Bind as object
          if (rebind) {
            context.rebind(tail, obj);
          } else {
            context.bind(tail, obj);
          }
        }
        break;
        case BindingType._ncontext: {
          // Narrow to a naming context using Java casts. It must
          // work.
          NamingContext objContext = (NamingContext) obj;
          // Bind as context
          if (rebind) {
            context.rebind_context(tail, objContext);
          } else {
            context.bind_context(tail, objContext);
          }
        }
        break;
        default:
          // This should not happen
          throw staticWrapper.namingCtxBadBindingtype();
      }
    }
  }

  /**
   * Implements resolving names in this NamingContext. The first component
   * of the supplied name is resolved in this NamingContext by calling
   * Resolve(). If there are no more components in the name, the
   * resulting object reference is returned. Otherwise, the resulting object
   * reference must have been bound as a context and be narrowable to
   * a NamingContext. If this is the case, the remaining
   * components of the name is resolved in the resulting NamingContext.
   * This method is static for maximal reuse - even for extended naming
   * context implementations where the recursive semantics still apply.
   *
   * @param impl an implementation of NamingContextDataStore
   * @param n a sequence of NameComponents which is the name to be resolved.
   * @return the object reference bound under the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * first component of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see resolve
   */
  public static org.omg.CORBA.Object doResolve(NamingContextDataStore impl,
      NameComponent[] n)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName {
    org.omg.CORBA.Object obj = null;
    BindingTypeHolder bth = new BindingTypeHolder();

    // Length must be greater than 0
    if (n.length < 1) {
      throw new InvalidName();
    }

    // The identifier must be set
    if (n.length == 1) {
      synchronized (impl) {
        // Resolve first level in this context
        obj = impl.Resolve(n[0], bth);
      }
      if (obj == null) {
        // Object was not found
        throw new NotFound(NotFoundReason.missing_node, n);
      }
      return obj;
    } else {
      // n.length > 1
      if ((n[1].id.length() == 0) && (n[1].kind.length() == 0)) {
        throw new InvalidName();
      }

      NamingContext context = resolveFirstAsContext(impl, n);

      // Compute restOfName = name[1..length]
      NameComponent[] tail = new NameComponent[n.length - 1];
      System.arraycopy(n, 1, tail, 0, n.length - 1);

      // Resolve rest of name in context
      try {
        // First try to resolve using the local call, this should work
        // most of the time unless there are federated naming contexts.
        Servant servant = impl.getNSPOA().reference_to_servant(
            context);
        return doResolve(((NamingContextDataStore) servant), tail);
      } catch (Exception e) {
        return context.resolve(tail);
      }
    }
  }

  /**
   * Implements unbinding bound names in this NamingContext. If the
   * name contains only one component, the name is unbound in this
   * NamingContext using Unbind(). Otherwise, the first component
   * of the name is resolved in this NamingContext and
   * unbind passed to the resulting NamingContext.
   * This method is static for maximal reuse - even for extended naming
   * context implementations where the recursive semantics still apply.
   *
   * @param impl an implementation of NamingContextDataStore
   * @param n a sequence of NameComponents which is the name to be unbound.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound A name with multiple components was
   * supplied, but the first component could not be resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * n-1 components of the supplied name.
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidName The supplied name is invalid (i.e.,
   * has length less than 1).
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see resolve
   */
  public static void doUnbind(NamingContextDataStore impl,
      NameComponent[] n)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName {
    // Name valid?
    if (n.length < 1) {
      throw new InvalidName();
    }

    // Unbind here?
    if (n.length == 1) {
      // The identifier must be set
      if ((n[0].id.length() == 0) && (n[0].kind.length() == 0)) {
        throw new InvalidName();
      }

      org.omg.CORBA.Object objRef = null;
      synchronized (impl) {
        // Yes: unbind in this context
        objRef = impl.Unbind(n[0]);
      }

      if (objRef == null)
      // It was not bound
      {
        throw new NotFound(NotFoundReason.missing_node, n);
      }
      // Done
      return;
    } else {
      // No: unbind in a different context

      // Resolve first  - must be resolveable
      NamingContext context = resolveFirstAsContext(impl, n);

      // Compute tail
      NameComponent[] tail = new NameComponent[n.length - 1];
      System.arraycopy(n, 1, tail, 0, n.length - 1);

      // Propagate unbind to this context
      context.unbind(tail);
    }
  }

  /**
   * Implements resolving a NameComponent in this context and
   * narrowing it to CosNaming::NamingContext. It will throw appropriate
   * exceptions if not found or not narrowable.
   *
   * @param impl an implementation of NamingContextDataStore
   * @param n a NameComponents which is the name to be found.
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound The first component could not be
   * resolved.
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Could not proceed in resolving the
   * first component of the supplied name.
   * @throws org.omg.CORBA.SystemException One of a fixed set of CORBA system exceptions.
   * @see resolve
   */
  protected static NamingContext resolveFirstAsContext(NamingContextDataStore impl,
      NameComponent[] n)
      throws org.omg.CosNaming.NamingContextPackage.NotFound {
    org.omg.CORBA.Object topRef = null;
    BindingTypeHolder bth = new BindingTypeHolder();
    NamingContext context = null;

    synchronized (impl) {
      // Resolve first  - must be resolveable
      topRef = impl.Resolve(n[0], bth);
      if (topRef == null) {
        // It was not bound
        throw new NotFound(NotFoundReason.missing_node, n);
      }
    }

    // Was it bound as a context?
    if (bth.value != BindingType.ncontext) {
      // It was not a context
      throw new NotFound(NotFoundReason.not_context, n);
    }

    // Narrow to a naming context
    try {
      context = NamingContextHelper.narrow(topRef);
    } catch (org.omg.CORBA.BAD_PARAM ex) {
      // It was not a context
      throw new NotFound(NotFoundReason.not_context, n);
    }

    // Hmm. must be ok
    return context;
  }


  /**
   * This operation creates a stringified name from the array of Name
   * components.
   *
   * @param n Name of the object <p>
   * @throws org.omg.CosNaming.NamingContextExtPackage.InvalidName Indicates the name does not
   * identify a binding.<p>
   */
  public String to_string(org.omg.CosNaming.NameComponent[] n)
      throws org.omg.CosNaming.NamingContextPackage.InvalidName {
    // Name valid?
    if ((n == null) || (n.length == 0)) {
      throw new InvalidName();
    }
    NamingContextDataStore impl = (NamingContextDataStore) this;

    String theStringifiedName = insImpl.convertToString(n);

    if (theStringifiedName == null) {
      throw new InvalidName();
    }

    return theStringifiedName;
  }


  /**
   * This operation  converts a Stringified Name into an  equivalent array
   * of Name Components.
   *
   * @param sn Stringified Name of the object <p>
   * @throws org.omg.CosNaming.NamingContextExtPackage.InvalidName Indicates the name does not
   * identify a binding.<p>
   */
  public org.omg.CosNaming.NameComponent[] to_name(String sn)
      throws org.omg.CosNaming.NamingContextPackage.InvalidName {
    // Name valid?
    if ((sn == null) || (sn.length() == 0)) {
      throw new InvalidName();
    }
    NamingContextDataStore impl = (NamingContextDataStore) this;
    org.omg.CosNaming.NameComponent[] theNameComponents =
        insImpl.convertToNameComponent(sn);
    if ((theNameComponents == null) || (theNameComponents.length == 0)) {
      throw new InvalidName();
    }
    for (int i = 0; i < theNameComponents.length; i++) {
      // If there is a name component whose id and kind null or
      // zero length string, then an invalid name exception needs to be
      // raised.
      if (((theNameComponents[i].id == null)
          || (theNameComponents[i].id.length() == 0))
          && ((theNameComponents[i].kind == null)
          || (theNameComponents[i].kind.length() == 0))) {
        throw new InvalidName();
      }
    }
    return theNameComponents;
  }

  /**
   * This operation creates a URL based "iiopname://" format name
   * from the Stringified Name of the object.
   *
   * @param addr internet based address of the host machine where Name Service is running <p>
   * @param sn Stringified Name of the object <p>
   * @throws org.omg.CosNaming.NamingContextExtPackage.InvalidName Indicates the name does not
   * identify a binding.<p>
   * @throws org.omg.CosNaming.NamingContextPackage.InvalidAddress Indicates the internet based
   * address of the host machine is incorrect <p>
   */

  public String to_url(String addr, String sn)
      throws org.omg.CosNaming.NamingContextExtPackage.InvalidAddress,
      org.omg.CosNaming.NamingContextPackage.InvalidName {
    // Name valid?
    if ((sn == null) || (sn.length() == 0)) {
      throw new InvalidName();
    }
    if (addr == null) {
      throw new
          org.omg.CosNaming.NamingContextExtPackage.InvalidAddress();
    }
    NamingContextDataStore impl = (NamingContextDataStore) this;
    String urlBasedAddress = null;
    urlBasedAddress = insImpl.createURLBasedAddress(addr, sn);
    // Extra check to see that corba name url created is valid as per
    // INS spec grammer.
    try {
      INSURLHandler.getINSURLHandler().parseURL(urlBasedAddress);
    } catch (BAD_PARAM e) {
      throw new
          org.omg.CosNaming.NamingContextExtPackage.InvalidAddress();
    }
    return urlBasedAddress;
  }

  /**
   * This operation resolves the Stringified name into the object
   * reference.
   *
   * @param sn Stringified Name of the object <p>
   * @throws org.omg.CosNaming.NamingContextPackage.NotFound Indicates there is no object reference
   * for the given name. <p>
   * @throws org.omg.CosNaming.NamingContextPackage.CannotProceed Indicates that the given compound
   * name is incorrect <p>
   * @throws org.omg.CosNaming.NamingContextExtPackage.InvalidName Indicates the name does not
   * identify a binding.<p>
   * @throws org.omg.CosNaming.NamingContextPackage.AlreadyBound Indicates the name is already
   * bound.<p>
   */
  public org.omg.CORBA.Object resolve_str(String sn)
      throws org.omg.CosNaming.NamingContextPackage.NotFound,
      org.omg.CosNaming.NamingContextPackage.CannotProceed,
      org.omg.CosNaming.NamingContextPackage.InvalidName {
    org.omg.CORBA.Object theObject = null;
    // Name valid?
    if ((sn == null) || (sn.length() == 0)) {
      throw new InvalidName();
    }
    NamingContextDataStore impl = (NamingContextDataStore) this;
    org.omg.CosNaming.NameComponent[] theNameComponents =
        insImpl.convertToNameComponent(sn);

    if ((theNameComponents == null) || (theNameComponents.length == 0)) {
      throw new InvalidName();
    }
    theObject = resolve(theNameComponents);
    return theObject;
  }


  transient protected ORB orb;

  public static String nameToString(NameComponent[] name) {
    StringBuffer s = new StringBuffer("{");
    if (name != null || name.length > 0) {
      for (int i = 0; i < name.length; i++) {
        if (i > 0) {
          s.append(",");
        }
        s.append("[").
            append(name[i].id).
            append(",").
            append(name[i].kind).
            append("]");
      }
    }
    s.append("}");
    return s.toString();
  }

  // Debugging aids.
  public static final boolean debug = false;

  private static void dprint(String msg) {
    NamingUtils.dprint("NamingContextImpl(" +
        Thread.currentThread().getName() + " at " +
        System.currentTimeMillis() +
        " ems): " + msg);
  }
}
